Merge pull request #4154 from GPCsolutions/dolibarr-md-icons

htdocs/theme/md/img/switch_on.png

htdocs/theme/md/img/tick.png

htdocs/theme/md/img/title_accountancy.png

htdocs/theme/md/img/title_bank.png

htdocs/theme/md/img/title_commercial.png

htdocs/theme/md/img/title_companies.png

htdocs/theme/md/img/title_generic.png

htdocs/theme/md/img/title_home.png

htdocs/theme/md/img/title_hrm.png

htdocs/theme/md/img/title_products.png

htdocs/theme/md/img/title_project.png

htdocs/theme/md/img/title_setup.png

htdocs/theme/md/img/unlock.png

htdocs/theme/md/img/vcard.png

htdocs/theme/md/img/view.png

htdocs/theme/md/img/warning.png